Our client, a prominent player in the Defence & Security sector, is currently looking for an Applications Support Engineer to join their dynamic team based in Harlow (Hybrid). This position is a Fixed Term Contract for 12 months, offering full-time hours of 37 hours per week. The successful applicant must be SC eligible.
About the Role:
The Applications Support Engineer will become part of the wider Data and BI Product Family, initially focusing on technical deployment and application support for a major financial planning transformation. This role involves a close working relationship with programme teams and Digital Technology functions such as Architecture, Security, and Operations. Strong technical troubleshooting skills and hands-on experience with financial planning platforms are essential.
Key Responsibilities:Deployment & Technical Support:*Support the initial deployment, configuration, and technical validation of the new financial platform.
*Provide hands-on troubleshooting and issue resolution across application, interface, and configuration layers.
*Work closely with infrastructure, network, and security teams to ensure end-to-end environment readiness.
Collaboration & Cross-Functional Engagement:*Collaborate with key programme stakeholders including Architecture, Engineering, Programme Delivery, QA, and Finance Operations.
*Participate in Agile ceremonies and contribute to iterative delivery cycles, backlog refinement, and continuous improvement.
*Assist in interpreting architectural and design requirements into actionable support tasks.
Operational Readiness & Transition:*Prepare the wider support organisation for steady-state operations by developing documentation, standard operating procedures, and knowledge articles.
*Deliver training and knowledge-transfer sessions to ensure operational teams can confidently support the live Finance platform.
*Contribute to hyper-care and early life support activities post-go-live.
Monitoring, Incident Management & Continuous Improvement:*Implement and maintain monitoring solutions to ensure system availability and performance.
*Manage incident triage, root cause analysis, and problem resolution for platform-related issues.
*Identify opportunities to enhance stability, resilience, and operational efficiency of the platform.
Job Requirements:Essential:*Experience in application support, ideally with finance platforms, OneStream in particular.
*Strong understanding of Service Management frameworks such as ITIL.
*Solid background in:*Operating system management (Windows/Linux)
*Application troubleshooting and performance optimisation
*Log analysis, system monitoring, and incident management

*Ability to collaborate effectively with technical and non-technical stakeholders.
*Experience working in structured delivery environments; familiarity with Agile ways of working is advantageous.
Desirable:*Experience in support of a wide range of Data and MI/BI platforms.
*Experience supporting applications in regulated industries (e.g., government, aerospace, and defence).
*Knowledge of integration concepts (ETL, Event, APIs, message-based interfaces).
*Exposure to deployment automation or DevOps practices.
Personal Attributes:*Strong analytical and problem-solving mindset.
*Clear communicator able to work across diverse technical teams.
*Proactive, collaborative, and committed to delivering high-quality support.
*Adaptable, eager to learn, and able to transition seamlessly between project and BAU contexts.

If you are a dedicated and skilled Applications Support Engineer looking to contribute to national security projects within a supportive and innovative environment, apply now to join our client’s esteemed team in Harlow.